Display screen or portion thereof with a graphical user interface



The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawings will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface according to a first embodiment; and,

FIG. 2 is a front view of a display screen or portion thereof with a graphical user interface according to a second embodiment.

The rectangular broken-line perimeter illustrates a display screen and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, substantially as shown and described. 